app/common/directives/log-search-control.html

<p class="content-label">Filter events</p>
<div class="content__search">
    <label for="content__search-input">Event Log Search</label>
    <input id="content__search-input" type="text" ng-model="customSearch" ng-keydown="doSearchOnEnter($event)"/>
    <input id="content__search-submit" type="submit" class="btn btn-primary" value="Filter" ng-click="doSearchOnClick()"/>
</div>